[ale] Mirroring drives without RAID

[Michael Trausch]

Raid can be rebuilt in any system, if software mdraid. Btrfs can do this too; set it to duplicate both metadata and data on a two drive volume. Repair can be done with any modern system with up to date btrfs utils and kernel driver. 

Sent from my iPhone

> On Feb 12, 2015, at 4:42 PM, Alex Carver <agcarver+ale at acarver.net> wrote:
> 
> Got an unusual question from someone at work.  He wants to set up a pair
> of drives to store test data which is usually of significant volume
> (several tens of GBs per test).
> 
> He doesn't want to use RAID so that any single drive can be plugged into
> any other computer to mount and recover the data directly.
> 
> The first thought was just a daily cron job rsyncing the two drives but
> I wanted to ask if there was some kind of solution that faked a mirrored
> RAID onto two drives where each drive is just a standard
> partition/volume set (i.e. it's composed only of ext2/3/4 partitions and
> not a RAID partition/volume)?
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